package com.dylon.common.utils;

import com.dylon.system.domain.SysUsers;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.crypto.SecureRandomNumberGenerator;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.Subject;

/**
 * shiro 工具类
 * 
 * @author ruoyi
 */
public class ShiroUtils {

    public static Subject getSubject()
    {
        return SecurityUtils.getSubject();
    }

    public static Session getSession()
    {
        return SecurityUtils.getSubject().getSession();
    }

    public static void logout()
    {
        getSubject().logout();
    }

    public static SysUsers getSysUser(){
        SysUsers user = null;
        Object obj = getSubject().getPrincipal();
        if (StringUtils.isNotNull(obj)) {
            user = new SysUsers();
            BeanUtils.copyBeanProp(user, obj);
        }
        return user;
    }

//    public static void setSysUser(SysUsers user){
//        Subject subject = getSubject();
//        PrincipalCollection principalCollection = subject.getPrincipals();
//        String realmName = principalCollection.getRealmNames().iterator().next();
//        PrincipalCollection newPrincipalCollection = new SimplePrincipalCollection(user, realmName);
//        // 重新加载Principal
//        subject.runAs(newPrincipalCollection);
//    }
//
//    public static void clearCachedAuthorizationInfo(){
//        RealmSecurityManager rsm = (RealmSecurityManager) SecurityUtils.getSecurityManager();
//        ShiroRealm realm = (ShiroRealm) rsm.getRealms().iterator().next();
//        realm.clearCachedAuthorizationInfo();
//    }

    public static Long getUserId()
    {
        return getSysUser().getUserId().longValue();
    }

    public static String getLoginName(){
        return getSysUser().getAccount();
    }

    public static String getIp()
    {
        return getSubject().getSession().getHost();
    }

    public static String getSessionId()
    {
        return String.valueOf(getSubject().getSession().getId());
    }

    /**
     * 生成随机盐
     */
    public static String randomSalt(){
        // 一个Byte占两个字节，此处生成的3字节，字符串长度为6
        SecureRandomNumberGenerator secureRandom = new SecureRandomNumberGenerator();
        String hex = secureRandom.nextBytes(3).toHex();
        return hex;
    }

    public static boolean passWordMatches(SysUsers user,String passWord){
        return user.getPassWord().equals(DigestUtils.md5Hex(passWord));
    }
}
